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Three new polyphenols from the rhizomes of Arachniodes exilis

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Three new polyphenols, araspidin BB (1), arachniodesin A (2) and arachniodesin B (3), together with two known compounds, epicatechin (4) and procyanidin B-2 (5), were isolated from the rhizomes of Arachniodes exilis. The structures of three new compounds were elucidated as 5-methyl-methylene-bis-phlorobutyrophenone (1), 4-ethoxycarbonylmethylepicatechin (2) and epicatechin-(4 → 8)-4-ethoxycarbonylmethylepicatechin (3), on the basis of their spectral analysis and by comparing them with the related model compounds. Compounds 4 and 5 were obtained from the title plant for the first time.
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Keywords: Arachniodes exilis; arachniodesin A; arachniodesin B; araspidin BB; polyphenols

Document Type: Research Article

Affiliations: Tong Ji Pharmaceutical College, Huazhong University of Science and Technology, Wuhan, China

Publication date: June 1, 2008

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